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Processing and Properties of Polycarbonate/Liquid Crystal Polymer Blends

  • A. Valenza , F. P. La Mantia , M. Paci and P. L. Magagnini
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 6 Issue 3

Abstract

Rheological and mechanical properties, structural characteristics, extrusion and injection molding behavior of blends of polycarbonate (PC) with a thermotropic, wholly aromatic copolyesteramide have been investigated. The processability of polycarbonate is remarkably improved by addition of small contents of liquid crystal polymer. All the flow curves of the blends lie between those of the pure components. In the processing conditions adopted, the LCP particles are easily elongated in the flow direction. In this direction the elastic modulus rises remarkably with LCP content. The modulus-composition curve is, however, lower than that expected on the basis of an additive rule due to the incompatibility and poor adhesion between the two phases. Finally, injection molding of this extrusion grade PC has been easily performed by adding small contents of LCP. The impact strength values of the injection molding samples of these blends are only slightly lower than that of the pure PC.

* Mail address: Dr. A. Valenza, Dipartimento di Ingegneria Chimica, dei Processi e dei Materiali, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
Accepted: 1990-10-22
Published Online: 2013-05-27
Published in Print: 1991-09-01

© 1991, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Die Extrusion
  4. Finite Element Analysis of Polymer Melt Flow in Profile Extrusion Coating Die
  5. Simultaneous Diameter and Thickness Control in Tube Extrusion
  6. A Stick-Slip Problem Related to Melt Fracture in Polymer Processing Operations
  7. Effects of Plasticizers on Extrusion of Dry Blended PVC
  8. Flow-Induced Crystallization and Self-Reinforcement During Extrusion
  9. Molding
  10. A Fundamental Experimental Study of the Mechanisms of Warpage and Shrinkage of Polyethylene in Rotational Molding
  11. Closed Loop Control of Parison Dimension Profiles in Extrusion Blow Molding
  12. Liquid Crystal Polyesters
  13. Effect of Thermal History on Viscoelastic Properties of Thermotropic Liquid Crystalline Copolyesters
  14. Molecular Orientation and Modulus of a Thermotropic Liquid Crystalline Copolyester
  15. Production and Characterization of Fine-dispersed Mixtures of Liquid Crystalline with Conventional Polymers
  16. Processing and Properties of Polycarbonate/Liquid Crystal Polymer Blends
  17. Rapid Communication of Recent Advances
  18. Generation of Corners in Profile Extrusion**
  19. Coextruded Infrared Reflecting Films
https://doi.org/10.3139/217.910247

Articles in the same Issue

  1. Contents
  2. Contents
  3. Die Extrusion
  4. Finite Element Analysis of Polymer Melt Flow in Profile Extrusion Coating Die
  5. Simultaneous Diameter and Thickness Control in Tube Extrusion
  6. A Stick-Slip Problem Related to Melt Fracture in Polymer Processing Operations
  7. Effects of Plasticizers on Extrusion of Dry Blended PVC
  8. Flow-Induced Crystallization and Self-Reinforcement During Extrusion
  9. Molding
  10. A Fundamental Experimental Study of the Mechanisms of Warpage and Shrinkage of Polyethylene in Rotational Molding
  11. Closed Loop Control of Parison Dimension Profiles in Extrusion Blow Molding
  12. Liquid Crystal Polyesters
  13. Effect of Thermal History on Viscoelastic Properties of Thermotropic Liquid Crystalline Copolyesters
  14. Molecular Orientation and Modulus of a Thermotropic Liquid Crystalline Copolyester
  15. Production and Characterization of Fine-dispersed Mixtures of Liquid Crystalline with Conventional Polymers
  16. Processing and Properties of Polycarbonate/Liquid Crystal Polymer Blends
  17. Rapid Communication of Recent Advances
  18. Generation of Corners in Profile Extrusion**
  19. Coextruded Infrared Reflecting Films
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